LONDON.- An historic and rare clock believed to have been designed for Napoleons Exposition publique des produits de lindustrie Francaise in 1801 and which has lain undiscovered in Europe for two centuries, is to be sold at Bonhams, New Bond Street, as part of its sale of Fine Clocks and Watches on 28 June 2011. Estimated at £200,000 300,000, the clock was designed by French clock maker, Hartmann, and uses the Republican calendar, the decimal time system put into effect by Napoleon in 1793. Napoleon established the exposition in 1798 to showcase Frances burgeoning industry. In 1801, the exposition was held in the courtyard of the Louvre and it is recorded that, in this exhibition, a clock maker named Hartmann of 9 rue de Vannes gained an honourable mention for a clock with eight dials which showed the rising and setting